telescope vector

R language because of the efficiency problem, the realization of natural language processing analysis will be affected, how to improve the efficiency and improve the accuracy of the word vector is in the current software environment, compared with the need to solve the problem.The author thinks that there are still some problems:1, how to improve the operating efficiency of large-scale corpus in the R language environment?2, how to improve the accurac

Today, I learned a bit about computational geometry, which is about determining whether a point is within a triangle (on a two-dimensional plane). One of the algorithms is "the same direction method", mainly with the cross product to determine whether the two points on the same side of a line segment, (1) is shown. About "The same way" again not to do specific introduction, interested students can Baidu, or focus on my post updated. I'll continue to learn, summarize and post on the blog in the "

Source: http://www.jb51.net/article/44231.htmFont: [Increase decrease] Type: Reprint time: 2013-12-08 I want to commentVectors are vector types that can hold many types of data, such as several integers, so call it a container, this article describes how to useVectors are vector types that can hold many types of data, such as several integers, so they are called containers.

0. Preface In order to solve the problem of raster slicing, long slicing time, large amount of data transmission and weak style customization ability, more and more enterprise cases begin to use vector deception as the way of map loading in Webgis. So far, the more successful and common use of vector slicing technology flow, mainly divided into the following two kinds. ArcGIS Pro makes

The most basic data type of R language-vectors (vector)1, insert the vector element, all elements in the same vector must be the same pattern (data type), such as Integer, numeric (floating-point), character (string), logical, plural, and so on. View the type of the variable can be queried using the typeof (X) function.> #插入向量元素 > x 2, delete the elements in the

Original link: http://blog.csdn.net/cws1214/article/details/47984053 1. Avoid frequent redistribution One of the most admirable features of STL containers is that they can automatically grow enough to accommodate the data you put in, as long as they are not larger than their maximum size. (To know the maximum value, just call the member function named Max_size.) ） For vectors and strings, if more space is needed, the size is increased by a similar realloc thought. This realloc-like operation ha

In practice, the vector series in c ++-C ++ 11 extends the vector member functions (cbegin (), cend (), crbegin (), crend (), and emplace (), data ()) The emplace_back mentioned above is added to C ++ 11. Therefore, this blog just wants to list how C ++ 11 expands the vector container. Std: vector: cbegin and std:

Vector of C ++ sequential containers, vector of sequential containers What is container Container, as its name implies, is a place for storing things. C ++ containers store certain data structures for data search or sorting or other special purposes. As we all know, common data structures are similar to arrays.Array, Linked listList, TreeTreeStackStack, QueueQueue, HashHash Table, SetSet, I

public class Operatevector { /* * * * * */ public Vector Buildvector () { vector vtemps = new vector (); for (int i=0;i vector vtemp = new vector (); for (int j=0;j vtemp.addelement ("Vector (" +i+ ") (" +j+ ")"); 　　 } vte

In practice, the vector series in c ++ -- copy set to vector (do not confuse reserve and resize) The stl algorithm has a copy function. We can easily write this Code: #include #include #include using namespace std;int _tmain(int argc, _TCHAR* argv[]){ double darray[10]={1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9}; vector vdouble(10);

Vector Vectors are collections of objects of the same type. Each object in the collection has a corresponding index. Vectors are often referred to as containers (container).To use vectors, you need to: #include The vector is a class template (classes template). C + + has functional templates and class templates. The template itself is not a function or class, it must be instantiated by the co